<!DOCTYPE html>
<html lang="en">

	<head>
		<meta charset="UTF-8">
		<title>第一个three.js文件_WebGL三维场景</title>
		<style>
			body {
				margin: 0;
				overflow: hidden;
				/* 隐藏body窗口区域滚动条 */
			}
		</style>
		<!--引入three.js三维引擎-->
		<script src="http://www.yanhuangxueyuan.com/versions/threejsR92/build/three.js"></script>
		<script src='./JS/OrbitControls.js'></script>
		<!-- <script src="./three.js"></script> -->
		<!-- <script src="http://www.yanhuangxueyuan.com/threejs/build/three.js"></script> -->
	</head>

	<body>
		<script>
			// 创建场景对象Scene
			var scene = new THREE.Scene();
			
			
			var geometry = new THREE.BoxGeometry(100, 100, 100); //创建一个立方体几何对象Geometry
			geometry.scale(2, 2, 2);
			// 遍历几何体的face属性
			geometry.faces.forEach(face => {
			  // 设置三角面face三个顶点的颜色
			  face.vertexColors = [
			    new THREE.Color(0xffff00),
			    new THREE.Color(0xff00ff),
			    new THREE.Color(0x00ffff),
			  ]
			});
			
			// // 直线基础材质对象
			// var material = new THREE.LineBasicMaterial({
			//   color: 0x0000ff
			// });
			// var line = new THREE.Line(geometry, material); //线模型对象
			// scene.add(line)
			
			// 虚线材质对象：产生虚线效果
			var material = new THREE.LineDashedMaterial({
			  color: 0x0000ff,
			  dashSize: 10,//显示线段的大小。默认为3。
			  gapSize: 5,//间隙的大小。默认为1
			});
			var line = new THREE.Line(geometry, material); //线模型对象
			//  computeLineDistances方法  计算LineDashedMaterial所需的距离数组
			line.computeLineDistances();
			scene.add(line); //点模型添加到场景中
			
			
			
			
			
			
			
			
			// 辅助三维坐标系AxisHelper
			var axisHelper = new THREE.AxisHelper(250);
			scene.add(axisHelper);

			/**
			 * 光源设置
			 */
			//点光源
			
			var ambient = new THREE.AmbientLight(0x444444);
			scene.add(ambient);	
			
			/**
			 * 相机设置
			 */
			var width = window.innerWidth; //窗口宽度
			var height = window.innerHeight; //窗口高度
			var k = width / height; //窗口宽高比
			var s = 200; //三维场景显示范围控制系数，系数越大，显示的范围越大
			//创建相机对象
			var camera = new THREE.OrthographicCamera(-s * k, s * k, s, -s, 1, 1000);
			camera.position.set(200, 300, 200); //设置相机位置
			camera.lookAt(scene.position); //设置相机方向(指向的场景对象)
			/**
			 * 创建渲染器对象
			 */
			var renderer = new THREE.WebGLRenderer();
			renderer.setSize(width, height); //设置渲染区域尺寸
			renderer.setClearColor(0xb9d3ff, 1); //设置背景颜色
			document.body.appendChild(renderer.domElement); //body元素中插入canvas对象
			let render = () => {
				renderer.render(scene, camera); //执行渲染操作
			}
			render();

			var controls = new THREE.OrbitControls(camera, renderer.domElement); //创建控件对象
			controls.addEventListener('change', render); //监听鼠标、键盘事件
		</script>
	</body>
</html>
